Roof and floor construction



May 9, 1933. T. GENTz ROOF` AND FLOOR CONSTRUCTION Filed June 25, 1928'KM/U7 vcA TTORNEYS Patented May 9, 1933 FFECE fl THEODORE GENTZ, orMILWAUKEE, wisconsin noon Ann rLooR oons'rnuorron Application led .Tune25, 1928. Serial No. 288,20*?.

This invention relates to improvements in roof and floor construction.

It is one of the objects of this invention to provide an improved rooi2and floor construction which is reproof, which is an eii'cient heatinsulator, and which possesses the desirable characteristics of strengthand lightness of weight.

lt is a further object of this inventionto provide a roof and iioorconstruction in which joists of a particular type are employed in perportions between the angle bars thereby' forming a supporting` meanswhich allows a larger span without impairing the strength of theconstruction.

It is a further object of this invention to provide a. roof and floorconstruction which is simple, inexpensive to install, and well adapt- 09ed for the purpose described.

lVith the above and other objects in view, the invention consists of theimproved rootl and floor construction and all its parts and combinationsas set forth in the claims and all 5 equivalents thereof.

In the accompanying drawing, in which the same reference charactersdesignate the same parts in all of the views:

Fig. l is a vertical sectional View of a portion of a loor embodying theimproved construction Fig. 2 is a sectional View taken on line 2-2 ofFig. l, part being broken away; and

Fig. 3 is a View similar to Fig. 2 showing a modiiied form.

Referring to the drawing, the numeral 5 designates the wall of abuilding having a recess 5 and the numeral 6 a supporting beam. Spanningthe distance between the wall and the beam are a plurality of transversesupporting members or joists "Yispaced at intervals from one another.The joists comprise a pair of angle bars 8 embracing opposite sides ofupper portions of an an-V gular web bar 9, as clearly shown in Figs. 1and 2. llhe lower portions of the web bar are secured Vto 'a bottomchord 10 which eX- tends parallel to the angle bars. The end portions ofthe bottom chord extend angularly upwardly as at ll and then outwardlygos at 12 where they are secured to the angle ars.

The angle bars provide flanges for supporting the side edges of plasterboards 13, the said plaster boards extending to the angle` bar of thenext joist. rlhe plaster boards form the foundation for the roofcomposition which consists of cementitious material 14 which is pouredover the plaster boards to a depth greater than the height of theangle.70 bars. The cementitious material is reinforced by a metallicmesh 15 which is laid over the top of the angle bars, the mesh beingpermitted to sag intermediate of the joists, thereby carrying thegreater part of the weight oli-'75 the cementitious material.

In the modified form of joist illustrated in F ig. 3 the angle bars arespaced apart by an inverted channel bar 16, the angles being welded tothe sides of the channel. The web` 30 member extends up into thechannel, its upper portions being welded or otherwise secured to thelower side of the top of the channel bar.

This roof construction is capable of carry-U g5 ing considerable weightdue to the fact that the webbed joists, which form an integral part ofthe liiu'shed roof, present a much stronger construction than if angleor T bars alone without the webbed constructions were used to supportthe edges of the plaster board.

From the foregoing description it may be seen that the improved roof andfloor construction is simple and inexpensive, light in weight, and welladapted for the purpose described.

WVhat I claim is: A roof or floor construction comprising spaced apartsupporting portions, joists laidV in inter-spaced relation transverse ofsaid supporting portions, a pair of angle bars for each joist, the upperportions of the joists being secured between said angle bars and saidangle bars having horizontal sides extending laterally in oppositedirections and having vertical sides extending upwardly, compositionboards supported by the horizontal sides of the angle bars7 and acementitious material carried by said composition boards and extendingabove the upper edges of the joists, the upper portions of said joistswhich are secured between the angle bars and the vertical sides of theangle bars extendingl above the lower surface of the cementitiousmaterial and above the upper surface of the composition boards asubstantial distance into the cementitious material so that the joists,composition boards and cementitious material are all firmly bonded toone another.

In testimony whereof, I aiix my i nature.

THEODORE G NTZ.

